Internal-combustion engine



April 2o, 1926.

- R. WALKER INTERNAL COMBUSTION ENGINE Fi1ef1 Jan. 25. 1924 Imveidw direction with the governor shaft Patented Apr. 20, 1926.

RUDOLF WALKER, OE VIENNmAU-STRIA.

INTERNAL-OOMBSTION ENGINE.

Appiicat'in mea January 25, 1924. seriarNo. 688,527.

To all whom t 'may concern:

Be it known that I, RUDOLF IVALKER, a subject of the Kingdom 'of Great Britain, residing at Vienna, Austria, have invented Improvements in and Relating to Internal- Combustion Engines,of which the following is a specification. f

The present invention relates to internal combustion engines. The object of the invention is to simplify the construction of internal combustion engines, more particularly of internal combustion engines operated with injection of fuel, by the control of the engine being derived from a separately journalled control shaft, which is common to the fuel pumps and fuel valves and by the Aaxial displacement of which produced by the action of the governor the operation of the engine is regulable at the Various speeds of revolution.

In the accompanying drawing wherein an approved embodiment of the invention as applied to a two cylinder two stroke cycle engine is shown,

Fig. 1 is a longitudinal `section of the invention,

Fig. 2 is a plan view, partly in section,l

the sectional portion ofthe view being taken on the line BB of Fig. 3.

Fig. 3 is a cross section on the lin-e A-A of Fig. 1 and,

Fig. 4 is a fragmentary end elevation as seen from the right of Fig. 1.

1 is the control shaft, on which the cams 2, 3 for the fuel pumps 4, 5 and the cams 6, 7 for the fuel injection valves are mounted. The control shaft 1 is coupled in the axial 8 in such a manner that it is capable of being displaced'relatively tov the latter, such displacement being capable of at least controlling the fuel pump. In the constructional example shown in the drawing the fuel pump cams 2, 3 are tapered, so that through the axial displacement of the cam shaft the delivery of the fuel pumps may be varied by the lengt-h of stroke of the fuel pump pistons being varied. 'Ihe coupling of the control shaft 1 with the tubular governor shaft 8 is eli'ected by means of roller-shaped driving members 10, between which a fork-shaped interniediate. member 11 fixed to the control shaft is guided by means of the prongs 12 for facilitatingby rolling friction the displacement of the control shaft. T he control shaft is spring controlled in such a manner that the governor can bring about a displacement of the control shaft only after overcoming t-he resistance ofthe spring` which 1s adjustable. In the drawing a fork 14 engages .the control shaft by means of a bolt 13,'the said fork being loaded by a spring, which is capable of being tightened and slackened and acts in opposition to the governor. l v

On the governor shaft 8, preferably outside t-he casing enclosing the cont-rol means and the governor, a stepped worm 15 is provided for automatically putting into operation the working and auxiliary cylinders which are started by the reduction of the compression resistances. The stepped worm 15 co-acts with a worm'roller 16 which is journalled in a forked lever 17 mounted on a compression relief shaft 18, on which levers 19, 19 are provided for operating rods 2O for closing the air outlet valves not shown. By turning the decompression shaft 18, the engine is changed from the starting position, in which the air outlet valves are open, to the operative posit-ion of the engine, in which the air outlet valves are closed. The turning ofthe decompression shaftis effected by the wormroller 16, which before starting up is brought .into engagement with the outermost convolution of the thread of t-he step Of greatest diameter of the worm 15. After a number of revolutions corresponding to the number of convolutions of the thread, the roller ceases to engage with the greater step, but engages with the smaller step, whereby a rotary` impulse is imparted to the ldecompression shaft 18, by which one of the decompression valves is closed, while the decompression valve of t-he second cylinder is not closed, until the roller 16 ceases to engage with the last convolution of the worm, so that the working cylinders with the corresponding auxiliary cylinders are brought not simultaneously but after a different number of revolutions automatically from decompression into the normal operative state.

For varying the commencement of the injection of fuel independently of the position of the control shaft an eccentric shaft 2l and eccentric rods 9.2 are provided, which engage pivoted members 23 of the valve rod v work, which form the support for rollers 2a coacting with the valve cams 6, 7, so that, by turning the eccentric shaft, the rollers 24 can be removed from the cams 6, 7, and

ently of the quantity of fuel corresponding to the load at any time sooner. This may be effected by the cont-rol cams 6, 7 of the injection valves being made tapered.

lVhat I claim is:

l. In an internal combustion engine, a governor shaft, means supporting said shaftand preventing axial displacement thereof, a cam shaft, a governor adapted to displace the cam shaft axially, said cam shaft and governor shaft being arranged inline one behind the other, means independent of the governor shaft supporting the cam shaft., and a coupling between the cam shaft and the governor shaft. l

2. In an internal combustion engine,l a governor shaft mounted to prevent axial displacement thereof, a cam shaft, and a governor adapted to displace the cam shaft axially, said cam shaft and governorl shaft being arranged in line one behindv the other,

a housing for the cam shaft and governor shaft, fuel pumps mounted on said housing, and means actuated by the cam shaft' for yinto the combustion engine.

operating the fuel pumps and also mounted on said housing. v

3; An internal combustion engine, a governor shaft mounted to prevent axial movement thereof, a cam shaft, a governor-shaft adapted to 'displace the camshaft axially,

said clam shaft and governor shaftfbeingrarrangedl in line one behind the other, fuel pump and fuel injection valve operating;

cams carried by and displaceable with the cam shaft, and means independent .of the cam shaft for variably controlling the operation of a fuel injection valve whereby to vary the moment of injection of the fuel -1. An internal combustion engine as claimed. in claim 2 characterized by the provision of fuel pump and fuel injection valve operating cams carried by and displaceable with the cam shaft, and means independent of the cam shaft for variably controlling the operation offa fuel injection valve whereby to vary the moment of injection of the fuel into the combustion engine.

5. An internal combustion engine, a governor shaft mounted to prevent axial movement thereof, a cam shaft, a governor shaft adapted to displace the cam shaft axially, said clam shaft and governor shaftI being arranged in line one behind the other, a coupling between the cam shaft and governor shaft including roller shaped driving mem-l bers.

In Witness whereof I have hereunto signed my name.

RUDOLF WALKER. 

